Output Files

• If outputstyle=`sky':
  1. flatexpimgset: an 2-byte-real-valued exposure map (without vignetting) in sky coordinates is contained in the primary image extension.
  2. vigexpimgset: an 2-byte-real-valued exposure map (with vignetting) in sky coordinates is contained in the primary image extension.

  Each of these datasets contains the same keywords in the primary HDU as the template image, except for DSS-related keywords. Extra extensions in the template image are not propagated.

• If outputstyle=`raw':
  1. flatexpcubeset: an exposure cube (without vignetting) is contained in the primary image extension.
  2. vigexpcubeset: an exposure cube (with vignetting) is contained in the primary image extension.

  The format of these cubes is as follows. The cube is a 3-dimensional image which is stored in the primary extension of the relevant dataset. The stored values are 2-byte reals. The order of the indices is such that, if the cube is accessed via the dal function real32Array3Data(), the 1st index of the returned pointer cube is the CCD number; the 2nd and 3rd indices respectively correspond to the RAWX and RAWY axes of each CCD.

  ***** plus gti extensions

  ***** plus fracexp kwds??

  Later these datasets will contain some informative keywords: at present they are a bit bare.